Multi switch or enum within material editor?

Is there any option for doing a drop-down list for material parameters? (Instead of having a bunch of Boolean switches). A multi-switch.

I have a bunch of pattern overlays that are currently turned off and on with switches (texture objects multiplied by the base color). I want the level designer to have to choose between then, not have multiple patterns active at the same time (which i can’t do with boolean switches).

bumping because I too would like to know